<p>
  Long volatility means that the value of your portfolio increases when the volatility goes up.
  Short volatility means that you make money when the volatility goes down. The simplest example of volatility selling involves the sale of put and call contracts.
  Traders often long volatility by holding the long position of put or call options for hedging purpose.
  In contrast, the short volatility strategy expects to earn the systematic risk premium by selling options.
  This algorithm will explore the risk premium effect in volatility selling.
</p>
